We Are Ophthalmology LTD We Care About Your Health

Over the years, Ophthalmology LTD's name has become associated with the highest quality of comprehensive medical and surgical eye care. Highly trained ophthalmologists David West, Bryan Hammer, Gregory Osmundson, Eric Thomas, Dustin Dierks, Ryan Geraets, Michael Eide, Elizabeth Atchison, and Elise In’t Veld, as well as experienced optometrists Andrea McCann and Emily Walters combine their considerable expertise to give each and every patient the best possible care. Ophthalmology LTD delivers treatment for cataracts, glaucoma, diabetic eye disease, as well as cornea transplants, oculoplastic surgery, retina surgery, vitreoretinal surgery, and pediatric eye care in Sioux Falls.

The Finest Eye Specialists in the Tri-State Area

Ophthalmology LTD brings the finest eye specialists in South Dakota to satellite offices in the tri-state area: Luverne, Pipestone, Worthington and Windom in Minnesota, Rock Valley, Sibley, and Sioux Center in Iowa, as well as Dell Rapids, Madison, Mitchell, and Yankton in South Dakota.


In 1968, Ophthalmology LTD revolutionized eye care by taking a comprehensive approach, bringing patients a full range of vision specialties under one roof. Today, eye care teams across the nation are now mimicking the strategy we have spent more than 50 years perfecting. It is because of this experience and our genuine dedication to our patients that our team is widely considered the finest, most comprehensive group of sub-specialty eye surgeons in the tri-state Siouxland area.

Our Services

Our ophthalmologists have expertise in a wide range of specialties and work as a team to meet your eye care needs.


Not only is cataract treatment the most frequently performed surgery in the United States, it is also one of the most successful. More than 99% of patients who undergo cataract removal rank their vision as significantly improved. Drs. Osmundson, Hammer, Dierks, Eide, In't Veld, and West perform this highly effective procedure.

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Early detection and treatment is the key to preventing vision loss with Glaucoma. More than three million Americans have glaucoma, but only half are actually aware that this "silent thief" is slowly and without warning stealing away their vision, sometimes without any noticeable symptoms. Drs. Osmundson and In't Veld  at Ophthalmology LTD specializes in the diagnosis and treatment of glaucoma.

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Children should have a yearly comprehensive eye exam along with their parents. Many vision problems can be detected early and treated before they become detrimental to a child's development, learning abilities, and every day function. Dr. West of Ophthalmology LTD has 22 years of experience in the evaluation and treatment of children's vision.

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The retina functions much like the film in a camera, and when film is damaged, so is the picture. Our retinal specialists Drs. Geraets, Thomas, and Atchison  offer comprehensive retinal exams and treatment to protect against diseases such as diabetic retinopathy that can damage your retina and vision.

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If a window pane is distorted or marred by imperfections, it is difficult to see out through it clearly. Your cornea is your eye’s window. To keep it clear or to restore it to its proper state, Dr. Eide of Ophthalmology LTD uses his specialty training in corneal diseases to treat dry eye, keratoconus, and other conditions that can cause corneal imperfections.

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When your eyelids, eye sockets, or tear ducts malfunction, or a tumor threatens your vision, Ophthalmology LTD oculoplastic surgeon Dr. Hammer can help. Specializing in procedures that restore clear vision as well as a more youthful appearance, Dr. Hammer treats and manages a wide variety of ocular conditions.

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We are a team of passionate professionals with
caring for patients in South Dakota, Minnesota, & Iowa.

Have a look around, then call, request an appointment online, or come by to learn more about how our team of eye experts can help you and your family.

  • Sue B.

    Professional and very friendly staff. Each stage of the exam was explained in detail. The doctor went through my options, gave me his recommendations and answered all of my questions. I was able to schedule treatment during that visit quickly... read more

  • Janice B.

    Great personal service well organized

  • Kim H.

    Very detailed. Explained everything. Felt relief. and in great hands. Thank you

  • Sharon S.

    Everyone very knowledgeable and polite.

  • Kay N.

    I know they were very thorough with the tests etc. All the receptionists, nurses and
    the Doctor were very pleasant and very
    helpful. I recommend anyone to go to
    Ophthalmology LTD.

  • Janice K.

    I received excellent care while a patient at Ophthalmology. They are very well organized with staff and equipment. I am very happy that I picked them to take care of me.

  • Christi W.

    Dr Hammer is amazing, personable person. I enjoy the care I receive and he gets to the route of the problem. The care the staff gives and the friendly atmosphere is also wonderful. I would highly recommend this group.

  • Gail B.

    Having just moved to Sioux Falls I did not know where to go after experiencing trouble with my eyes. After going to ophthalmology Ltd and seeing Dr Thomas I was so amazed and confident that I had chosen the right... read more

  • Savannahngwen W.

    I had a good time at this place no waiting for very long

  • Rachelle T.

    Dr. West did a great job with my daughter! I highly recommend Ophthalmology Ltd

  • Jackie L.

    The ladies in the front were so nice and really made me comfortable. Loved the nurses. Can’t remember her name, but she had beautiful red hair. The doctor explained everything to me, and now I know why my eye is... read more

  • Mary R.

    I have been a Glaucoma patient of Dr. Osmundson at Ophthalmology LTD for years. He is amazing … knowledgeable, patient, caring, and mostly he listens to me talk about how important my ‘sight’ is to my life. He... read more

  • John L.

    Clean. Prompt. Knowledgeable. Polite

  • Peg S.

    Every person I dealt with including receptionist, nurse, Dr. Eide.

    Professional and helpful from first step in door till leaving.

  • Brenda C.

    Everyone was very nice and professional. Procedure was done quickly and there was very little waiting.

  • Candace N.

    Dr Geteats and his entire staff were absolutely wonderful! Everyone was incredibly kind, courteous, helpful, informative and encouraging!
    I had complete confidence in Dr Gereat’s abilty to repair my detached retina.
    I highly recommend Ophthalmology LTD!!!

  • Melinda L.

    Staff is friendly. Dr Osmundson is professional and caring. He explains things throughout the visit.

  • Colleen W.

    Dr. McCann is amazing. I felt so comfortable with her.

  • Sandra A.

    Dr. Edie is Great! I would recommend Ophthalmology LTD for all your eye care needs. They have a great and friendly staff.

  • Sandi P.

    Excellent care from all the staff.

  • Ginny K.

    Great Doctors for all issues of your eye problems . Easy to access and helpful people to help you . On time that they schedule your appointments for .

  • Julie J.

    I had a very good appointment. Nice to meet you!

  • Brent S.

    I was seen at this practice as I was traveling through the area and developed symptoms suggesting concerns about a possible retinal problem. Everyone in the practice was extremely helpful and professional. I was able to schedule an appointment last... read more

  • Sharon K.

    All of my experiences have been great ! Kind people and very accommodating! Always on time for my appointment

  • Cornelius D.

    Very nice
    Friendly people, patient and great atmosphere

  • Sally M.

    Polite and professional staff. Dr. provided findings using terms I could understand. I did not feel rushed out the door by asking questions. I would recommend these professionals to friends and family!

  • Stormi

    Staff and assistants were very nice and friendly.

  • Dan V.

    Very friendly and very accommodating would recommend to anybody

  • Peg V.

    Dr. Thomas has been a God send to me. When I first went in I was so scared I was loosing my sight. I was diagnosed with Macular Degeneration (the wet kind). I wasn’t even able to do any of... read more

  • Emily H.

    Great staff and environment! My son has seen Dr West since he was 2 and we have always had a great experience!

  • Amy B.

    It was my first time there and I got treated like a queen ‼️😍 everyone one went all out to help me. And they all were kind and helpful 🤩 when I need help that’s where I will go. I... read more

  • Darlene J.

    Very good , courteous sn very through

  • Kristi H.

    I highly recommend Ophthalmology Ltd. I had a great experience there. The staff is fantastic.

  • Brandon R.

    paitent care is phenomenal. waiting times are as minimal as can be. staff is always courteous and if you go there enough they remember you.

  • LaMont K.

    Always pleasant and never have to wait

  • Jeannie O.

    Dr Walters is amazing.The whole staff is .Highly recommend

  • Margery T.

    I had laser surgery for my eyes. My vision has been surprisingly clearer. Didn’t know I even needed it. Hoping the floaters disappear as advised.

  • Joseph O.

    Timely. And polite clean and sanitary

  • Mike P.

    very helpful caring professional

  • Jane L.

    Dr. Geraets was very professional and took my paranorma of needles into consideration..Took my shot with ease. Thank you Dr.

  • Linda H.

    It was a great experience. The clinic is run “like a well oiled machine” Everyone was very kind and professional. I can’t say enough good things about Dr Hammer and his staff.

  • Becky H.

    Always pleasant and professional.

  • Pauline P.

    No matter the reason for my visit, from regular checkups to cataract surgery, my experience has always been the best.

  • Lori R.

    I was very impressed with the staff that took care of me during my initial visit and testing. They were kind, knowledgeable and patient. Dr. Elizabeth Atchison gave me my results and was very thorough during the eye exam and... read more

  • Heather C.

    A comfortable atmosphere with relaxed lighting, spacious waiting rooms, respectful & caring professionals! 👓🕶

  • Lori R.

    Great experience with Dr. Atchison and the staff here. The assistants were very knowledgeable during my testing stages. Dr. Atchison was thorough, kind and patient with my questions and during the eye exam. If you are looking for a doctor... read more

  • Teryl K.

    The doctors at Opthamology Ltd. are the best I have ever been too. Knowledge, skills and care are above reproach.

  • Nick A.

    Very professional and thorough exam. Very little waiting time.

  • Linda A.

    The Staff is great and fun to be around. Especially since it’s your first visit and nervous about what is happening with your eyes. The nurse and Doctor make you feel very at ease. Was very nervous about getting an... read more

  • John J.

    they are very good at what they do. i wouldn't choose any other besides them.